Wireless terminal device, communications system, and communication control method

A communications system where a plurality of wireless terminal devices form a group, one terminal in the group becomes a master station, and the remaining terminals become slave stations, thereby performing communications between the master station and the slave stations,

• wherein the wireless terminal device comprises switchable operation modes including at least:
• a standby mode for performing communications within the group and obtaining information regarding a terminal that is able to communicate with its own terminal (hereinafter referred to as the “communication-possible terminal information”);
• a master station mode for operating as the master station;
• and a slave station mode for operating as the slave station, and
• wherein, the wireless terminal devices further comprises:
• a first unit for obtaining another terminal's the communication-possible terminal information, selecting a candidate terminal for the master station on the basis of the respective terminals' communication-possible terminal information, and notifying other terminals of the selection results;
• and
• a second unit for, on the basis of the selection results, switching its mode to the master station mode when its own terminal is selected as the candidate terminal for the master station, and switching its mode to slave station mode when its own terminal is not selected as such.

A communication control method of a wireless terminal device, used for a communications system where a plurality of wireless terminal devices form a group, one terminal in the group becomes a master station, and the remaining terminals become slave stations, thereby performing communications between the master station and the slave stations,

• wherein the method comprises the steps of:
• performing communications within the group and obtaining information regarding a terminal that is able to communicate with its own terminal (hereinafter referred to as the “communication-possible terminal information”);
• obtaining another terminal's communication-possible terminal information, selecting a candidate terminal for the master station on the basis of the respective terminals' communication-possible terminal information, and notifying other terminals of the selection results;
• and
• switching its mode, on the basis of the selection results, to master station mode when its own terminal is selected as the candidate terminal for the master station, and to slave station mode when its own terminal is not selected as such.

A communication control method, used for a communications system where a plurality of wireless terminal devices form a group, one terminal in the group becomes a master station, and the remaining terminals become slave stations, thereby performing communications between the master station and the slave stations,

• wherein the method comprises:
• a step in which each terminal performs communications within the group and obtains information regarding a terminal that is able to communicate with its own terminal (hereinafter referred to as the “communication-possible terminal information”);
• a step in which a first terminal obtains another terminal's communication-possible terminal information;
• selects a candidate terminal for the master station on the basis of the respective terminals' communication-possible terminal information;
• and notifies other terminals of the selection results;
• and
• a step in which each terminal switches its mode, on the basis of the selection results, to master station mode when its own terminal is selected as the candidate terminal for the master station, and to slave station mode when its own terminal is not selected as such.